1 /* 2 * Copyright (c) 2001-2002 by David Brownell 3 * 4 * This program is free software; you can redistribute it and/or modify it 5 * under the terms of the GNU General Public License as published by the 6 * Free Software Foundation; either version 2 of the License, or (at your 7 * option) any later version. 8 * 9 * This program is distributed in the hope that it will be useful, but 10 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 11 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write to the Free Software Foundation, 16 * Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 17 */ 18 19 /* this file is part of ehci-hcd.c */ 20 21 #ifdef DEBUG 22 23 /* check the values in the HCSPARAMS register 24 * (host controller _Structural_ parameters) 25 * see EHCI spec, Table 2-4 for each value 26 */ 27 static void dbg_hcs_params (struct ehci_hcd *ehci, char *label) 28 { 29 u32 params = ehci_readl(ehci, &ehci->caps->hcs_params); 30 31 ehci_dbg (ehci, 32 "%s hcs_params 0x%x dbg=%d%s cc=%d pcc=%d%s%s ports=%d\n", 33 label, params, 34 HCS_DEBUG_PORT (params), 35 HCS_INDICATOR (params) ? " ind" : "", 36 HCS_N_CC (params), 37 HCS_N_PCC (params), 38 HCS_PORTROUTED (params) ? "" : " ordered", 39 HCS_PPC (params) ? "" : " !ppc", 40 HCS_N_PORTS (params) 41 ); 42 /* Port routing, per EHCI 0.95 Spec, Section 2.2.5 */ 43 if (HCS_PORTROUTED (params)) { 44 int i; 45 char buf [46], tmp [7], byte; 46 47 buf[0] = 0; 48 for (i = 0; i < HCS_N_PORTS (params); i++) { 49 // FIXME MIPS won't readb() ... 50 byte = readb (&ehci->caps->portroute[(i>>1)]); 51 sprintf(tmp, "%d ", 52 ((i & 0x1) ? ((byte)&0xf) : ((byte>>4)&0xf))); 53 strcat(buf, tmp); 54 } 55 ehci_dbg (ehci, "%s portroute %s\n", 56 label, buf); 57 } 58 } 59 #else 60 61 static inline void dbg_hcs_params (struct ehci_hcd *ehci, char *label) {} 62 63 #endif 64 65 #ifdef DEBUG 66 67 /* check the values in the HCCPARAMS register 68 * (host controller _Capability_ parameters) 69 * see EHCI Spec, Table 2-5 for each value 70 * */ 71 static void dbg_hcc_params (struct ehci_hcd *ehci, char *label) 72 { 73 u32 params = ehci_readl(ehci, &ehci->caps->hcc_params); 74 75 if (HCC_ISOC_CACHE (params)) { 76 ehci_dbg (ehci, 77 "%s hcc_params %04x caching frame %s%s%s\n", 78 label, params, 79 HCC_PGM_FRAMELISTLEN(params) ? "256/512/1024" : "1024", 80 HCC_CANPARK(params) ? " park" : "", 81 HCC_64BIT_ADDR(params) ? " 64 bit addr" : ""); 82 } else { 83 ehci_dbg (ehci, 84 "%s hcc_params %04x thresh %d uframes %s%s%s%s%s%s%s\n", 85 label, 86 params, 87 HCC_ISOC_THRES(params), 88 HCC_PGM_FRAMELISTLEN(params) ? "256/512/1024" : "1024", 89 HCC_CANPARK(params) ? " park" : "", 90 HCC_64BIT_ADDR(params) ? " 64 bit addr" : "", 91 HCC_LPM(params) ? " LPM" : "", 92 HCC_PER_PORT_CHANGE_EVENT(params) ? " ppce" : "", 93 HCC_HW_PREFETCH(params) ? " hw prefetch" : "", 94 HCC_32FRAME_PERIODIC_LIST(params) ? 95 " 32 periodic list" : ""); 96 } 97 } 98 #else 99 100 static inline void dbg_hcc_params (struct ehci_hcd *ehci, char *label) {} 101 102 #endif 103 104 #ifdef DEBUG 105 106 static void __maybe_unused 107 dbg_qtd (const char *label, struct ehci_hcd *ehci, struct ehci_qtd *qtd) 108 { 109 ehci_dbg(ehci, "%s td %p n%08x %08x t%08x p0=%08x\n", label, qtd, 110 hc32_to_cpup(ehci, &qtd->hw_next), 111 hc32_to_cpup(ehci, &qtd->hw_alt_next), 112 hc32_to_cpup(ehci, &qtd->hw_token), 113 hc32_to_cpup(ehci, &qtd->hw_buf [0])); 114 if (qtd->hw_buf [1]) 115 ehci_dbg(ehci, " p1=%08x p2=%08x p3=%08x p4=%08x\n", 116 hc32_to_cpup(ehci, &qtd->hw_buf[1]), 117 hc32_to_cpup(ehci, &qtd->hw_buf[2]), 118 hc32_to_cpup(ehci, &qtd->hw_buf[3]), 119 hc32_to_cpup(ehci, &qtd->hw_buf[4])); 120 } 121 122 static void __maybe_unused 123 dbg_qh (const char *label, struct ehci_hcd *ehci, struct ehci_qh *qh) 124 { 125 struct ehci_qh_hw *hw = qh->hw; 126 127 ehci_dbg (ehci, "%s qh %p n%08x info %x %x qtd %x\n", label, 128 qh, hw->hw_next, hw->hw_info1, hw->hw_info2, hw->hw_current); 129 dbg_qtd("overlay", ehci, (struct ehci_qtd *) &hw->hw_qtd_next); 130 } 131 132 static void __maybe_unused 133 dbg_itd (const char *label, struct ehci_hcd *ehci, struct ehci_itd *itd) 134 { 135 ehci_dbg (ehci, "%s [%d] itd %p, next %08x, urb %p\n", 136 label, itd->frame, itd, hc32_to_cpu(ehci, itd->hw_next), 137 itd->urb); 138 ehci_dbg (ehci, 139 " trans: %08x %08x %08x %08x %08x %08x %08x %08x\n", 140 hc32_to_cpu(ehci, itd->hw_transaction[0]), 141 hc32_to_cpu(ehci, itd->hw_transaction[1]), 142 hc32_to_cpu(ehci, itd->hw_transaction[2]), 143 hc32_to_cpu(ehci, itd->hw_transaction[3]), 144 hc32_to_cpu(ehci, itd->hw_transaction[4]), 145 hc32_to_cpu(ehci, itd->hw_transaction[5]), 146 hc32_to_cpu(ehci, itd->hw_transaction[6]), 147 hc32_to_cpu(ehci, itd->hw_transaction[7])); 148 ehci_dbg (ehci, 149 " buf: %08x %08x %08x %08x %08x %08x %08x\n", 150 hc32_to_cpu(ehci, itd->hw_bufp[0]), 151 hc32_to_cpu(ehci, itd->hw_bufp[1]), 152 hc32_to_cpu(ehci, itd->hw_bufp[2]), 153 hc32_to_cpu(ehci, itd->hw_bufp[3]), 154 hc32_to_cpu(ehci, itd->hw_bufp[4]), 155 hc32_to_cpu(ehci, itd->hw_bufp[5]), 156 hc32_to_cpu(ehci, itd->hw_bufp[6])); 157 ehci_dbg (ehci, " index: %d %d %d %d %d %d %d %d\n", 158 itd->index[0], itd->index[1], itd->index[2], 159 itd->index[3], itd->index[4], itd->index[5], 160 itd->index[6], itd->index[7]); 161 } 162 163 static void __maybe_unused 164 dbg_sitd (const char *label, struct ehci_hcd *ehci, struct ehci_sitd *sitd) 165 { 166 ehci_dbg (ehci, "%s [%d] sitd %p, next %08x, urb %p\n", 167 label, sitd->frame, sitd, hc32_to_cpu(ehci, sitd->hw_next), 168 sitd->urb); 169 ehci_dbg (ehci, 170 " addr %08x sched %04x result %08x buf %08x %08x\n", 171 hc32_to_cpu(ehci, sitd->hw_fullspeed_ep), 172 hc32_to_cpu(ehci, sitd->hw_uframe), 173 hc32_to_cpu(ehci, sitd->hw_results), 174 hc32_to_cpu(ehci, sitd->hw_buf[0]), 175 hc32_to_cpu(ehci, sitd->hw_buf[1])); 176 } 177 178 static int __maybe_unused 179 dbg_status_buf (char *buf, unsigned len, const char *label, u32 status) 180 { 181 return scnprintf (buf, len, 182 "%s%sstatus %04x%s%s%s%s%s%s%s%s%s%s%s", 183 label, label [0] ? " " : "", status, 184 (status & STS_PPCE_MASK) ? " PPCE" : "", 185 (status & STS_ASS) ? " Async" : "", 186 (status & STS_PSS) ? " Periodic" : "", 187 (status & STS_RECL) ? " Recl" : "", 188 (status & STS_HALT) ? " Halt" : "", 189 (status & STS_IAA) ? " IAA" : "", 190 (status & STS_FATAL) ? " FATAL" : "", 191 (status & STS_FLR) ? " FLR" : "", 192 (status & STS_PCD) ? " PCD" : "", 193 (status & STS_ERR) ? " ERR" : "", 194 (status & STS_INT) ? " INT" : "" 195 ); 196 } 197 198 static int __maybe_unused 199 dbg_intr_buf (char *buf, unsigned len, const char *label, u32 enable) 200 { 201 return scnprintf (buf, len, 202 "%s%sintrenable %02x%s%s%s%s%s%s%s", 203 label, label [0] ? " " : "", enable, 204 (enable & STS_PPCE_MASK) ? " PPCE" : "", 205 (enable & STS_IAA) ? " IAA" : "", 206 (enable & STS_FATAL) ? " FATAL" : "", 207 (enable & STS_FLR) ? " FLR" : "", 208 (enable & STS_PCD) ? " PCD" : "", 209 (enable & STS_ERR) ? " ERR" : "", 210 (enable & STS_INT) ? " INT" : "" 211 ); 212 } 213 214 static const char *const fls_strings [] = 215 { "1024", "512", "256", "??" }; 216 217 static int 218 dbg_command_buf (char *buf, unsigned len, const char *label, u32 command) 219 { 220 return scnprintf (buf, len, 221 "%s%scommand %07x %s%s%s%s%s%s=%d ithresh=%d%s%s%s%s " 222 "period=%s%s %s", 223 label, label [0] ? " " : "", command, 224 (command & CMD_HIRD) ? " HIRD" : "", 225 (command & CMD_PPCEE) ? " PPCEE" : "", 226 (command & CMD_FSP) ? " FSP" : "", 227 (command & CMD_ASPE) ? " ASPE" : "", 228 (command & CMD_PSPE) ? " PSPE" : "", 229 (command & CMD_PARK) ? " park" : "(park)", 230 CMD_PARK_CNT (command), 231 (command >> 16) & 0x3f, 232 (command & CMD_LRESET) ? " LReset" : "", 233 (command & CMD_IAAD) ? " IAAD" : "", 234 (command & CMD_ASE) ? " Async" : "", 235 (command & CMD_PSE) ? " Periodic" : "", 236 fls_strings [(command >> 2) & 0x3], 237 (command & CMD_RESET) ? " Reset" : "", 238 (command & CMD_RUN) ? "RUN" : "HALT" 239 ); 240 } 241 242 static int 243 dbg_port_buf (char *buf, unsigned len, const char *label, int port, u32 status) 244 { 245 char *sig; 246 247 /* signaling state */ 248 switch (status & (3 << 10)) { 249 case 0 << 10: sig = "se0"; break; 250 case 1 << 10: sig = "k"; break; /* low speed */ 251 case 2 << 10: sig = "j"; break; 252 default: sig = "?"; break; 253 } 254 255 return scnprintf (buf, len, 256 "%s%sport:%d status %06x %d %s%s%s%s%s%s " 257 "sig=%s%s%s%s%s%s%s%s%s%s%s", 258 label, label [0] ? " " : "", port, status, 259 status>>25,/*device address */ 260 (status & PORT_SSTS)>>23 == PORTSC_SUSPEND_STS_ACK ? 261 " ACK" : "", 262 (status & PORT_SSTS)>>23 == PORTSC_SUSPEND_STS_NYET ? 263 " NYET" : "", 264 (status & PORT_SSTS)>>23 == PORTSC_SUSPEND_STS_STALL ? 265 " STALL" : "", 266 (status & PORT_SSTS)>>23 == PORTSC_SUSPEND_STS_ERR ? 267 " ERR" : "", 268 (status & PORT_POWER) ? " POWER" : "", 269 (status & PORT_OWNER) ? " OWNER" : "", 270 sig, 271 (status & PORT_LPM) ? " LPM" : "", 272 (status & PORT_RESET) ? " RESET" : "", 273 (status & PORT_SUSPEND) ? " SUSPEND" : "", 274 (status & PORT_RESUME) ? " RESUME" : "", 275 (status & PORT_OCC) ? " OCC" : "", 276 (status & PORT_OC) ? " OC" : "", 277 (status & PORT_PEC) ? " PEC" : "", 278 (status & PORT_PE) ? " PE" : "", 279 (status & PORT_CSC) ? " CSC" : "", 280 (status & PORT_CONNECT) ? " CONNECT" : ""); 281 } 282 283 #else 284 static inline void __maybe_unused 285 dbg_qh (char *label, struct ehci_hcd *ehci, struct ehci_qh *qh) 286 {} 287 288 static inline int __maybe_unused 289 dbg_status_buf (char *buf, unsigned len, const char *label, u32 status) 290 { return 0; } 291 292 static inline int __maybe_unused 293 dbg_command_buf (char *buf, unsigned len, const char *label, u32 command) 294 { return 0; } 295 296 static inline int __maybe_unused 297 dbg_intr_buf (char *buf, unsigned len, const char *label, u32 enable) 298 { return 0; } 299 300 static inline int __maybe_unused 301 dbg_port_buf (char *buf, unsigned len, const char *label, int port, u32 status) 302 { return 0; } 303 304 #endif /* DEBUG */ 305 306 /* functions have the "wrong" filename when they're output... */ 307 #define dbg_status(ehci, label, status) { \ 308 char _buf [80]; \ 309 dbg_status_buf (_buf, sizeof _buf, label, status); \ 310 ehci_dbg (ehci, "%s\n", _buf); \ 311 } 312 313 #define dbg_cmd(ehci, label, command) { \ 314 char _buf [80]; \ 315 dbg_command_buf (_buf, sizeof _buf, label, command); \ 316 ehci_dbg (ehci, "%s\n", _buf); \ 317 } 318 319 #define dbg_port(ehci, label, port, status) { \ 320 char _buf [80]; \ 321 dbg_port_buf (_buf, sizeof _buf, label, port, status); \ 322 ehci_dbg (ehci, "%s\n", _buf); \ 323 } 324 325 /*-------------------------------------------------------------------------*/ 326 327 #ifdef STUB_DEBUG_FILES 328 329 static inline void create_debug_files (struct ehci_hcd *bus) { } 330 static inline void remove_debug_files (struct ehci_hcd *bus) { } 331 332 #else 333 334 /* troubleshooting help: expose state in debugfs */ 335 336 static int debug_async_open(struct inode *, struct file *); 337 static int debug_periodic_open(struct inode *, struct file *); 338 static int debug_registers_open(struct inode *, struct file *); 339 static int debug_async_open(struct inode *, struct file *); 340 341 static ssize_t debug_output(struct file*, char __user*, size_t, loff_t*); 342 static int debug_close(struct inode *, struct file *); 343 344 static const struct file_operations debug_async_fops = { 345 .owner = THIS_MODULE, 346 .open = debug_async_open, 347 .read = debug_output, 348 .release = debug_close, 349 .llseek = default_llseek, 350 }; 351 static const struct file_operations debug_periodic_fops = { 352 .owner = THIS_MODULE, 353 .open = debug_periodic_open, 354 .read = debug_output, 355 .release = debug_close, 356 .llseek = default_llseek, 357 }; 358 static const struct file_operations debug_registers_fops = { 359 .owner = THIS_MODULE, 360 .open = debug_registers_open, 361 .read = debug_output, 362 .release = debug_close, 363 .llseek = default_llseek, 364 }; 365 366 static struct dentry *ehci_debug_root; 367 368 struct debug_buffer { 369 ssize_t (*fill_func)(struct debug_buffer *); /* fill method */ 370 struct usb_bus *bus; 371 struct mutex mutex; /* protect filling of buffer */ 372 size_t count; /* number of characters filled into buffer */ 373 char *output_buf; 374 size_t alloc_size; 375 }; 376 377 #define speed_char(info1) ({ char tmp; \ 378 switch (info1 & (3 << 12)) { \ 379 case QH_FULL_SPEED: tmp = 'f'; break; \ 380 case QH_LOW_SPEED: tmp = 'l'; break; \ 381 case QH_HIGH_SPEED: tmp = 'h'; break; \ 382 default: tmp = '?'; break; \ 383 }; tmp; }) 384 385 static inline char token_mark(struct ehci_hcd *ehci, __hc32 token) 386 { 387 __u32 v = hc32_to_cpu(ehci, token); 388 389 if (v & QTD_STS_ACTIVE) 390 return '*'; 391 if (v & QTD_STS_HALT) 392 return '-'; 393 if (!IS_SHORT_READ (v)) 394 return ' '; 395 /* tries to advance through hw_alt_next */ 396 return '/'; 397 } 398 399 static void qh_lines ( 400 struct ehci_hcd *ehci, 401 struct ehci_qh *qh, 402 char **nextp, 403 unsigned *sizep 404 ) 405 { 406 u32 scratch; 407 u32 hw_curr; 408 struct list_head *entry; 409 struct ehci_qtd *td; 410 unsigned temp; 411 unsigned size = *sizep; 412 char *next = *nextp; 413 char mark; 414 __le32 list_end = EHCI_LIST_END(ehci); 415 struct ehci_qh_hw *hw = qh->hw; 416 417 if (hw->hw_qtd_next == list_end) /* NEC does this */ 418 mark = '@'; 419 else 420 mark = token_mark(ehci, hw->hw_token); 421 if (mark == '/') { /* qh_alt_next controls qh advance? */ 422 if ((hw->hw_alt_next & QTD_MASK(ehci)) 423 == ehci->async->hw->hw_alt_next) 424 mark = '#'; /* blocked */ 425 else if (hw->hw_alt_next == list_end) 426 mark = '.'; /* use hw_qtd_next */ 427 /* else alt_next points to some other qtd */ 428 } 429 scratch = hc32_to_cpup(ehci, &hw->hw_info1); 430 hw_curr = (mark == '*') ? hc32_to_cpup(ehci, &hw->hw_current) : 0; 431 temp = scnprintf (next, size, 432 "qh/%p dev%d %cs ep%d %08x %08x (%08x%c %s nak%d)", 433 qh, scratch & 0x007f, 434 speed_char (scratch), 435 (scratch >> 8) & 0x000f, 436 scratch, hc32_to_cpup(ehci, &hw->hw_info2), 437 hc32_to_cpup(ehci, &hw->hw_token), mark, 438 (cpu_to_hc32(ehci, QTD_TOGGLE) & hw->hw_token) 439 ? "data1" : "data0", 440 (hc32_to_cpup(ehci, &hw->hw_alt_next) >> 1) & 0x0f); 441 size -= temp; 442 next += temp; 443 444 /* hc may be modifying the list as we read it ... */ 445 list_for_each (entry, &qh->qtd_list) { 446 td = list_entry (entry, struct ehci_qtd, qtd_list); 447 scratch = hc32_to_cpup(ehci, &td->hw_token); 448 mark = ' '; 449 if (hw_curr == td->qtd_dma) 450 mark = '*'; 451 else if (hw->hw_qtd_next == cpu_to_hc32(ehci, td->qtd_dma)) 452 mark = '+'; 453 else if (QTD_LENGTH (scratch)) { 454 if (td->hw_alt_next == ehci->async->hw->hw_alt_next) 455 mark = '#'; 456 else if (td->hw_alt_next != list_end) 457 mark = '/'; 458 } 459 temp = snprintf (next, size, 460 "\n\t%p%c%s len=%d %08x urb %p", 461 td, mark, ({ char *tmp; 462 switch ((scratch>>8)&0x03) { 463 case 0: tmp = "out"; break; 464 case 1: tmp = "in"; break; 465 case 2: tmp = "setup"; break; 466 default: tmp = "?"; break; 467 } tmp;}), 468 (scratch >> 16) & 0x7fff, 469 scratch, 470 td->urb); 471 if (size < temp) 472 temp = size; 473 size -= temp; 474 next += temp; 475 if (temp == size) 476 goto done; 477 } 478 479 temp = snprintf (next, size, "\n"); 480 if (size < temp) 481 temp = size; 482 size -= temp; 483 next += temp; 484 485 done: 486 *sizep = size; 487 *nextp = next; 488 } 489 490 static ssize_t fill_async_buffer(struct debug_buffer *buf) 491 { 492 struct usb_hcd *hcd; 493 struct ehci_hcd *ehci; 494 unsigned long flags; 495 unsigned temp, size; 496 char *next; 497 struct ehci_qh *qh; 498 499 hcd = bus_to_hcd(buf->bus); 500 ehci = hcd_to_ehci (hcd); 501 next = buf->output_buf; 502 size = buf->alloc_size; 503 504 *next = 0; 505 506 /* dumps a snapshot of the async schedule. 507 * usually empty except for long-term bulk reads, or head. 508 * one QH per line, and TDs we know about 509 */ 510 spin_lock_irqsave (&ehci->lock, flags); 511 for (qh = ehci->async->qh_next.qh; size > 0 && qh; qh = qh->qh_next.qh) 512 qh_lines (ehci, qh, &next, &size); 513 if (!list_empty(&ehci->async_unlink) && size > 0) { 514 temp = scnprintf(next, size, "\nunlink =\n"); 515 size -= temp; 516 next += temp; 517 518 list_for_each_entry(qh, &ehci->async_unlink, unlink_node) { 519 if (size <= 0) 520 break; 521 qh_lines(ehci, qh, &next, &size); 522 } 523 } 524 spin_unlock_irqrestore (&ehci->lock, flags); 525 526 return strlen(buf->output_buf); 527 } 528 529 #define DBG_SCHED_LIMIT 64 530 static ssize_t fill_periodic_buffer(struct debug_buffer *buf) 531 { 532 struct usb_hcd *hcd; 533 struct ehci_hcd *ehci; 534 unsigned long flags; 535 union ehci_shadow p, *seen; 536 unsigned temp, size, seen_count; 537 char *next; 538 unsigned i; 539 __hc32 tag; 540 541 if (!(seen = kmalloc (DBG_SCHED_LIMIT * sizeof *seen, GFP_ATOMIC))) 542 return 0; 543 seen_count = 0; 544 545 hcd = bus_to_hcd(buf->bus); 546 ehci = hcd_to_ehci (hcd); 547 next = buf->output_buf; 548 size = buf->alloc_size; 549 550 temp = scnprintf (next, size, "size = %d\n", ehci->periodic_size); 551 size -= temp; 552 next += temp; 553 554 /* dump a snapshot of the periodic schedule. 555 * iso changes, interrupt usually doesn't. 556 */ 557 spin_lock_irqsave (&ehci->lock, flags); 558 for (i = 0; i < ehci->periodic_size; i++) { 559 p = ehci->pshadow [i]; 560 if (likely (!p.ptr)) 561 continue; 562 tag = Q_NEXT_TYPE(ehci, ehci->periodic [i]); 563 564 temp = scnprintf (next, size, "%4d: ", i); 565 size -= temp; 566 next += temp; 567 568 do { 569 struct ehci_qh_hw *hw; 570 571 switch (hc32_to_cpu(ehci, tag)) { 572 case Q_TYPE_QH: 573 hw = p.qh->hw; 574 temp = scnprintf (next, size, " qh%d-%04x/%p", 575 p.qh->period, 576 hc32_to_cpup(ehci, 577 &hw->hw_info2) 578 /* uframe masks */ 579 & (QH_CMASK | QH_SMASK), 580 p.qh); 581 size -= temp; 582 next += temp; 583 /* don't repeat what follows this qh */ 584 for (temp = 0; temp < seen_count; temp++) { 585 if (seen [temp].ptr != p.ptr) 586 continue; 587 if (p.qh->qh_next.ptr) { 588 temp = scnprintf (next, size, 589 " ..."); 590 size -= temp; 591 next += temp; 592 } 593 break; 594 } 595 /* show more info the first time around */ 596 if (temp == seen_count) { 597 u32 scratch = hc32_to_cpup(ehci, 598 &hw->hw_info1); 599 struct ehci_qtd *qtd; 600 char *type = ""; 601 602 /* count tds, get ep direction */ 603 temp = 0; 604 list_for_each_entry (qtd, 605 &p.qh->qtd_list, 606 qtd_list) { 607 temp++; 608 switch (0x03 & (hc32_to_cpu( 609 ehci, 610 qtd->hw_token) >> 8)) { 611 case 0: type = "out"; continue; 612 case 1: type = "in"; continue; 613 } 614 } 615 616 temp = scnprintf (next, size, 617 " (%c%d ep%d%s " 618 "[%d/%d] q%d p%d)", 619 speed_char (scratch), 620 scratch & 0x007f, 621 (scratch >> 8) & 0x000f, type, 622 p.qh->usecs, p.qh->c_usecs, 623 temp, 624 0x7ff & (scratch >> 16)); 625 626 if (seen_count < DBG_SCHED_LIMIT) 627 seen [seen_count++].qh = p.qh; 628 } else 629 temp = 0; 630 tag = Q_NEXT_TYPE(ehci, hw->hw_next); 631 p = p.qh->qh_next; 632 break; 633 case Q_TYPE_FSTN: 634 temp = scnprintf (next, size, 635 " fstn-%8x/%p", p.fstn->hw_prev, 636 p.fstn); 637 tag = Q_NEXT_TYPE(ehci, p.fstn->hw_next); 638 p = p.fstn->fstn_next; 639 break; 640 case Q_TYPE_ITD: 641 temp = scnprintf (next, size, 642 " itd/%p", p.itd); 643 tag = Q_NEXT_TYPE(ehci, p.itd->hw_next); 644 p = p.itd->itd_next; 645 break; 646 case Q_TYPE_SITD: 647 temp = scnprintf (next, size, 648 " sitd%d-%04x/%p", 649 p.sitd->stream->interval, 650 hc32_to_cpup(ehci, &p.sitd->hw_uframe) 651 & 0x0000ffff, 652 p.sitd); 653 tag = Q_NEXT_TYPE(ehci, p.sitd->hw_next); 654 p = p.sitd->sitd_next; 655 break; 656 } 657 size -= temp; 658 next += temp; 659 } while (p.ptr); 660 661 temp = scnprintf (next, size, "\n"); 662 size -= temp; 663 next += temp; 664 } 665 spin_unlock_irqrestore (&ehci->lock, flags); 666 kfree (seen); 667 668 return buf->alloc_size - size; 669 } 670 #undef DBG_SCHED_LIMIT 671 672 static const char *rh_state_string(struct ehci_hcd *ehci) 673 { 674 switch (ehci->rh_state) { 675 case EHCI_RH_HALTED: 676 return "halted"; 677 case EHCI_RH_SUSPENDED: 678 return "suspended"; 679 case EHCI_RH_RUNNING: 680 return "running"; 681 case EHCI_RH_STOPPING: 682 return "stopping"; 683 } 684 return "?"; 685 } 686 687 static ssize_t fill_registers_buffer(struct debug_buffer *buf) 688 { 689 struct usb_hcd *hcd; 690 struct ehci_hcd *ehci; 691 unsigned long flags; 692 unsigned temp, size, i; 693 char *next, scratch [80]; 694 static char fmt [] = "%*s\n"; 695 static char label [] = ""; 696 697 hcd = bus_to_hcd(buf->bus); 698 ehci = hcd_to_ehci (hcd); 699 next = buf->output_buf; 700 size = buf->alloc_size; 701 702 spin_lock_irqsave (&ehci->lock, flags); 703 704 if (!HCD_HW_ACCESSIBLE(hcd)) { 705 size = scnprintf (next, size, 706 "bus %s, device %s\n" 707 "%s\n" 708 "SUSPENDED (no register access)\n", 709 hcd->self.controller->bus->name, 710 dev_name(hcd->self.controller), 711 hcd->product_desc); 712 goto done; 713 } 714 715 /* Capability Registers */ 716 i = HC_VERSION(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase)); 717 temp = scnprintf (next, size, 718 "bus %s, device %s\n" 719 "%s\n" 720 "EHCI %x.%02x, rh state %s\n", 721 hcd->self.controller->bus->name, 722 dev_name(hcd->self.controller), 723 hcd->product_desc, 724 i >> 8, i & 0x0ff, rh_state_string(ehci)); 725 size -= temp; 726 next += temp; 727 728 #ifdef CONFIG_PCI 729 /* EHCI 0.96 and later may have "extended capabilities" */ 730 if (hcd->self.controller->bus == &pci_bus_type) { 731 struct pci_dev *pdev; 732 u32 offset, cap, cap2; 733 unsigned count = 256/4; 734 735 pdev = to_pci_dev(ehci_to_hcd(ehci)->self.controller); 736 offset = HCC_EXT_CAPS(ehci_readl(ehci, 737 &ehci->caps->hcc_params)); 738 while (offset && count--) { 739 pci_read_config_dword (pdev, offset, &cap); 740 switch (cap & 0xff) { 741 case 1: 742 temp = scnprintf (next, size, 743 "ownership %08x%s%s\n", cap, 744 (cap & (1 << 24)) ? " linux" : "", 745 (cap & (1 << 16)) ? " firmware" : ""); 746 size -= temp; 747 next += temp; 748 749 offset += 4; 750 pci_read_config_dword (pdev, offset, &cap2); 751 temp = scnprintf (next, size, 752 "SMI sts/enable 0x%08x\n", cap2); 753 size -= temp; 754 next += temp; 755 break; 756 case 0: /* illegal reserved capability */ 757 cap = 0; 758 /* FALLTHROUGH */ 759 default: /* unknown */ 760 break; 761 } 762 temp = (cap >> 8) & 0xff; 763 } 764 } 765 #endif 766 767 // FIXME interpret both types of params 768 i = ehci_readl(ehci, &ehci->caps->hcs_params); 769 temp = scnprintf (next, size, "structural params 0x%08x\n", i); 770 size -= temp; 771 next += temp; 772 773 i = ehci_readl(ehci, &ehci->caps->hcc_params); 774 temp = scnprintf (next, size, "capability params 0x%08x\n", i); 775 size -= temp; 776 next += temp; 777 778 /* Operational Registers */ 779 temp = dbg_status_buf (scratch, sizeof scratch, label, 780 ehci_readl(ehci, &ehci->regs->status)); 781 temp = scnprintf (next, size, fmt, temp, scratch); 782 size -= temp; 783 next += temp; 784 785 temp = dbg_command_buf (scratch, sizeof scratch, label, 786 ehci_readl(ehci, &ehci->regs->command)); 787 temp = scnprintf (next, size, fmt, temp, scratch); 788 size -= temp; 789 next += temp; 790 791 temp = dbg_intr_buf (scratch, sizeof scratch, label, 792 ehci_readl(ehci, &ehci->regs->intr_enable)); 793 temp = scnprintf (next, size, fmt, temp, scratch); 794 size -= temp; 795 next += temp; 796 797 temp = scnprintf (next, size, "uframe %04x\n", 798 ehci_read_frame_index(ehci)); 799 size -= temp; 800 next += temp; 801 802 for (i = 1; i <= HCS_N_PORTS (ehci->hcs_params); i++) { 803 temp = dbg_port_buf (scratch, sizeof scratch, label, i, 804 ehci_readl(ehci, 805 &ehci->regs->port_status[i - 1])); 806 temp = scnprintf (next, size, fmt, temp, scratch); 807 size -= temp; 808 next += temp; 809 if (i == HCS_DEBUG_PORT(ehci->hcs_params) && ehci->debug) { 810 temp = scnprintf (next, size, 811 " debug control %08x\n", 812 ehci_readl(ehci, 813 &ehci->debug->control)); 814 size -= temp; 815 next += temp; 816 } 817 } 818 819 if (!list_empty(&ehci->async_unlink)) { 820 temp = scnprintf(next, size, "async unlink qh %p\n", 821 list_first_entry(&ehci->async_unlink, 822 struct ehci_qh, unlink_node)); 823 size -= temp; 824 next += temp; 825 } 826 827 #ifdef EHCI_STATS 828 temp = scnprintf (next, size, 829 "irq normal %ld err %ld iaa %ld (lost %ld)\n", 830 ehci->stats.normal, ehci->stats.error, ehci->stats.iaa, 831 ehci->stats.lost_iaa); 832 size -= temp; 833 next += temp; 834 835 temp = scnprintf (next, size, "complete %ld unlink %ld\n", 836 ehci->stats.complete, ehci->stats.unlink); 837 size -= temp; 838 next += temp; 839 #endif 840 841 done: 842 spin_unlock_irqrestore (&ehci->lock, flags); 843 844 return buf->alloc_size - size; 845 } 846 847 static struct debug_buffer *alloc_buffer(struct usb_bus *bus, 848 ssize_t (*fill_func)(struct debug_buffer *)) 849 { 850 struct debug_buffer *buf; 851 852 buf = kzalloc(sizeof(struct debug_buffer), GFP_KERNEL); 853 854 if (buf) { 855 buf->bus = bus; 856 buf->fill_func = fill_func; 857 mutex_init(&buf->mutex); 858 buf->alloc_size = PAGE_SIZE; 859 } 860 861 return buf; 862 } 863 864 static int fill_buffer(struct debug_buffer *buf) 865 { 866 int ret = 0; 867 868 if (!buf->output_buf) 869 buf->output_buf = vmalloc(buf->alloc_size); 870 871 if (!buf->output_buf) { 872 ret = -ENOMEM; 873 goto out; 874 } 875 876 ret = buf->fill_func(buf); 877 878 if (ret >= 0) { 879 buf->count = ret; 880 ret = 0; 881 } 882 883 out: 884 return ret; 885 } 886 887 static ssize_t debug_output(struct file *file, char __user *user_buf, 888 size_t len, loff_t *offset) 889 { 890 struct debug_buffer *buf = file->private_data; 891 int ret = 0; 892 893 mutex_lock(&buf->mutex); 894 if (buf->count == 0) { 895 ret = fill_buffer(buf); 896 if (ret != 0) { 897 mutex_unlock(&buf->mutex); 898 goto out; 899 } 900 } 901 mutex_unlock(&buf->mutex); 902 903 ret = simple_read_from_buffer(user_buf, len, offset, 904 buf->output_buf, buf->count); 905 906 out: 907 return ret; 908 909 } 910 911 static int debug_close(struct inode *inode, struct file *file) 912 { 913 struct debug_buffer *buf = file->private_data; 914 915 if (buf) { 916 vfree(buf->output_buf); 917 kfree(buf); 918 } 919 920 return 0; 921 } 922 static int debug_async_open(struct inode *inode, struct file *file) 923 { 924 file->private_data = alloc_buffer(inode->i_private, fill_async_buffer); 925 926 return file->private_data ? 0 : -ENOMEM; 927 } 928 929 static int debug_periodic_open(struct inode *inode, struct file *file) 930 { 931 struct debug_buffer *buf; 932 buf = alloc_buffer(inode->i_private, fill_periodic_buffer); 933 if (!buf) 934 return -ENOMEM; 935 936 buf->alloc_size = (sizeof(void *) == 4 ? 6 : 8)*PAGE_SIZE; 937 file->private_data = buf; 938 return 0; 939 } 940 941 static int debug_registers_open(struct inode *inode, struct file *file) 942 { 943 file->private_data = alloc_buffer(inode->i_private, 944 fill_registers_buffer); 945 946 return file->private_data ? 0 : -ENOMEM; 947 } 948 949 static inline void create_debug_files (struct ehci_hcd *ehci) 950 { 951 struct usb_bus *bus = &ehci_to_hcd(ehci)->self; 952 953 ehci->debug_dir = debugfs_create_dir(bus->bus_name, ehci_debug_root); 954 if (!ehci->debug_dir) 955 return; 956 957 if (!debugfs_create_file("async", S_IRUGO, ehci->debug_dir, bus, 958 &debug_async_fops)) 959 goto file_error; 960 961 if (!debugfs_create_file("periodic", S_IRUGO, ehci->debug_dir, bus, 962 &debug_periodic_fops)) 963 goto file_error; 964 965 if (!debugfs_create_file("registers", S_IRUGO, ehci->debug_dir, bus, 966 &debug_registers_fops)) 967 goto file_error; 968 969 return; 970 971 file_error: 972 debugfs_remove_recursive(ehci->debug_dir); 973 } 974 975 static inline void remove_debug_files (struct ehci_hcd *ehci) 976 { 977 debugfs_remove_recursive(ehci->debug_dir); 978 } 979 980 #endif /* STUB_DEBUG_FILES */ 981